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Licensed insulation contractors in Southern California
Every CSLB C-2 license with a business address in Los Angeles, Orange, San Diego, Riverside or San Bernardino County, from CSLB data updated 10/22/2026.
By county
Los Angeles County has the most, 150 of 475 (31.6%).
| County | Licenses | Active | Share of SoCal |
|---|---|---|---|
| Los Angeles County | 150 | 143 | 31.6% |
| San Diego County | 96 | 95 | 20.2% |
| Orange County | 95 | 92 | 20.0% |
| Riverside County | 78 | 76 | 16.4% |
| San Bernardino County | 56 | 56 | 11.8% |
Insulation & Acoustical (C-2) by city
- San Diego 30
- Anaheim 25
- Riverside 25
- Escondido 12
- Orange 11
- Corona 11
- Lakeside 10
- El Cajon 9
- San Bernardino 8
- Carlsbad 8
- Chatsworth 8
- Brea 7
- Los Angeles 7
- Murrieta 7
- Redlands 7
- Chino 7
- San Dimas 5
- Temecula 5
- Garden Grove 5
- Santa Fe Springs 5
- Moreno Valley 5
- Huntington Beach 4
- Santa Ana 4
- Van Nuys 4
- San Marcos 4
- Fontana 4
- Sherman Oaks 4
- Canoga Park 4
- Yucaipa 4
- Lancaster 4
- Fullerton 4
- Valencia 4
- North Hollywood 4
- Fountain Valley 4
- La Verne 3
- Alpine 3
- La Puente 3
- Palmdale 3
- Montclair 3
- Hemet 3
- Spring Valley 3
- Irvine 3
- Granada Hills 3
- Long Beach 3
- Coachella 3
- Costa Mesa 3
- Sylmar 3
- Oceanside 3
- Whittier 3
- Paramount 3
- Mission Viejo 3
- Diamond Bar 3
- Colton 3
- Perris 3
- Placentia 3
- Rancho Cucamonga 3
- Laguna Hills 2
- Bellflower 2
- Beaumont 2
- Eastvale 2
No new licenses for Insulation & Acoustical (C-2) across SoCal
None issued Oct 16 – Oct 22, 2026.
Quick facts
How many licensed insulation contractors are in Southern California?
475 insulation contractors with a California CSLB license list a business address in Southern California. 462 of them have an active license in good standing (CSLB data as of 10/22/2026).
How many insulation contractors in Southern California have a license problem right now?
13 are not in good standing right now, including 5 suspended for missing workers' comp. 24 active licenses expire within 90 days. Each county and city list linked here shows the status and a plain-English OK-to-hire verdict.
How do I check if an insulation contractor is licensed?
Search the business name or license number on LicenseWatch CA to see license status, bond and workers' comp in one place, then confirm on the CSLB website before you sign a contract. In California, work over $1,000 in labor and materials requires a licensed contractor.
New and lapsed SoCal licenses, every Monday
New licenses, expirations and workers' comp lapses across five counties. One short email a week.